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    What should I do if the water pressure has dropped in my boiler?

    Heating Engineers

    If the water pressure has dropped in my boiler, how much might this cost to have fixed? Is it an easy job and might it be a sign of a bigger issue? Thanks.

    Asked by Adam on 10th Feb 2022
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    Best Answer

    Tank Gas Heating

    "Record how often this is occurring. If it's every day you're having to top up, get an engineer to attend as this could be a fault in the boiler."

    Answered on 10th Feb 2022 - Member since Apr 2019 - report
    Galect Limited

    "If this happens often it usually means you have a leak somewhere. This leak has to be fixed. Otherwise, you can repressurize your boiler by using the filling loop on your system. The price will depend on the work required."

    Answered on 21st Feb 2022 - Member since Oct 2021 - report
    Alan Rutherford

    "3 things cause pressure to drop
    1. leaking radiator near valves
    2. Leak in the system
    3 Pressure relive valve is failing. You will know by looking outside for a copper 15mm pipe with water coming out or staining on a wall.

    You will need an engineer. Price about £100 top end."

    Answered on 10th Feb 2022 - Member since Sep 2019 - report
    SB Heating & Gas Services

    "Happens around 3-4 times a year naturally, if you top up a few times not to worry

    if you top up every day or every few there could be a leak

    cost depends on what kind if on boiler system would be an hourly rate + bottle of sealant with a plumber

    if its leaking from the boiler it could be a prv let by which is 70/80 to fix or if the secondary plate it could potentially be 150-200"

    Answered on 14th Mar 2022 - Member since Dec 2020 - report
    Gas & planning by khanlala

    "If water pressure keeps losing and there is no sign of leaking. Need to replace Expansion Vessel and PRV"

    Answered on 24th Feb 2022 - Member since Jan 2022 - report
    MY flame

    "Hi Adam
    You need to pressurise it by using the filling loop on your boiler. Make sure you keep an eye on your pressure gauge on the boiler keep the pressure up to 1 bar or just above. It’s not a big issue if it’s the first time if it keeps dropping on a regular base then you have an issue call a gas safe engineer to rectify the problem."

    Answered on 10th Feb 2022 - Member since Oct 2020 - report
    Sjl Plumbing Limited

    "A pressure drop could be a number of things
    1 you have a leak
    2 the pressure relief valve has failed
    3 the expansion vessel on the system has failed.
    You would need to get an engineer in to identify the problem"

    Answered on 20th Apr 2022 - Member since Mar 2022 - report
    Djendel and son plumbing

    "Hi Adam. You need to top it up from the filling loop underneath the boiler to 1.2bar. If still losing pressure every other day while using the heating. You need to seek a heating engineer"

    Answered on 10th Feb 2022 - Member since May 2020 - report
    TS Plumbing & Heating

    "Top the pressure up to 1.5 bar when the boiler is cold."

    Answered on 10th Feb 2022 - Member since Feb 2022 - report

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